The answer to 'lawn yellowing' is that there are several common causes, including nutrient deficiencies, drought stress, disease, or pests. Symptoms can include patches of yellow or discolored grass, thinning or bare spots, and an overall unhealthy appearance. The solution will depend on the underlying cause, but may involve adjusting soil pH, applying fertilizer, improving irrigation, or treating for disease or pests.
In many cases, lawn yellowing can be addressed with some simple DIY steps. However, if the problem persists or you're unsure of the cause, it's best to consult a professional landscaper or lawn care specialist. They can diagnose the issue and recommend the appropriate treatment to restore your lawn to a healthy, green condition.